Lake Ilsanjo Weather Forecast

    • 51
    • 77

    Partly Sunny

    • 51
    • 80

    Mostly Cloudy

    • 51
    • 76

    Partly Sunny

    • 53
    • 80

    Mostly Cloudy

    • 54
    • 83

    Partly Sunny

    • 52
    • 81

    Mostly Sunny

Today 15 Aug North Bay Interior Valleys

Mostly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the mid 60s to lower 80s. Southwest Winds 5 to 15 Mph.

Tonight 15 Aug North Bay Interior Valleys

Mostly clear in the evening then becoming mostly cloudy. Patchy fog in the evening. Areas of fog after midnight. Lows in the 40s to upper 50s. Southwest Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Ilsanjo Temperature Statistics

August Temperature

Santa Rosa, Santa Rosa Sonoma County Airport (11.2 miles)

  • Lowest 10 August, 2026

    49.6 °F

  • Average August

    69.1 °F

  • Highest 1 August, 2026

    98.7 °F

Climate (2021–2026)

Santa Rosa, Santa Rosa Sonoma County Airport (11.2 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    72.8 °F
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